最近到一些小学听一年级数学课,发现不少学生在做二十以内数的加减法时,仍不能脱离用手指、指关节、画道道计算.由此又联想到一些老师在教百以内不进位加法和不退位减法时,提前教给学生列奖式代替口算的现象,深感口算训练在教学中至今尚未摆到应有的位置.《小学数学教学大纲》明确指出:“在四则计算中,笔算是重点,口算是笔算的基础”,“要使学生先学好20以内口算加减 Recently, some primary schools to listen to the first grade math class and found that many students do less than 20 additions and subtractions, still can not be separated from the fingers, knuckles, draw road calculation. It is also reminiscent of some teachers within the teaching hundred Not carrying plus addition and no absenteeism subtraction, teaching students in advance to replace the phenomenon of the column instead of counting, I feel so far training in the teaching has not been put in place. “Primary Mathematics Teaching Syllabus” clearly states: “In the four calculations In the pen is the key point, the pen count is the basis for pen and pen calculations, ”" To make the students learn to add or subtract less than 20